メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.907602170691 43.5103637554161, 141.906934582032 43.5104655542116, 141.906686761564 43.5096101024176, 141.906475587723 43.5084122018081, 141.907000675359 43.5084318171984, 141.907947588997 43.5083264581961, 141.908517775437 43.5082560436947, 141.908525164455 43.5082650675114, 141.908816513707 43.5093117574874, 141.908940533914 43.510159628306, 141.907602170691 43.5103637554161)) ^^http://www.opengis.net/ont/geosparql#wktLiteral